src/texsourc/lib/libhpdf/src/hpdf_gstate.c

   1 /*
   2  * << Haru Free PDF Library >> -- hpdf_gstate.c
   3  *
   4  * URL: http://libharu.org
   5  *
   6  * Copyright (c) 1999-2006 Takeshi Kanno <takeshi_kanno@est.hi-ho.ne.jp>
   7  * Copyright (c) 2007-2009 Antony Dovgal <tony@daylessday.org>
   8  *
   9  * Permission to use, copy, modify, distribute and sell this software
  10  * and its documentation for any purpose is hereby granted without fee,
  11  * provided that the above copyright notice appear in all copies and
  12  * that both that copyright notice and this permission notice appear
  13  * in supporting documentation.
  14  * It is provided "as is" without express or implied warranty.
  15  *
  16  */
  17
  18 #include "hpdf_conf.h"
  19 #include "hpdf_utils.h"
  20 #include "hpdf_gstate.h"
  21
  22 HPDF_GState
  23 HPDF_GState_New  (HPDF_MMgr    mmgr,
  24                   HPDF_GState  current)
  25 {
  26     HPDF_GState  gstate;
  27
  28     if (current && current->depth >= HPDF_LIMIT_MAX_GSTATE) {
  29         HPDF_SetError (mmgr->error, HPDF_EXCEED_GSTATE_LIMIT, 0);
  30
  31         return NULL;
  32     }
  33
  34     gstate = HPDF_GetMem (mmgr, sizeof(HPDF_GState_Rec));
  35     if (!gstate)
  36         return NULL;
  37
  38     if (current) {
  39         gstate->trans_matrix = current->trans_matrix;
  40         gstate->line_width =  current->line_width;
  41         gstate->line_cap =  current->line_cap;
  42         gstate->line_join =  current->line_join;
  43         gstate->miter_limit =  current->miter_limit;
  44         gstate->dash_mode = current->dash_mode;
  45         gstate->flatness = current->flatness;
  46
  47         gstate->char_space = current->char_space;
  48         gstate->word_space = current->word_space;
  49         gstate->h_scalling = current->h_scalling;
  50         gstate->text_leading = current->text_leading;
  51         gstate->rendering_mode = current->rendering_mode;
  52         gstate->text_rise = current->text_rise;
  53
  54         gstate->cs_stroke = current->cs_stroke;
  55         gstate->cs_fill = current->cs_fill;
  56         gstate->rgb_fill = current->rgb_fill;
  57         gstate->rgb_stroke = current->rgb_stroke;
  58         gstate->cmyk_fill = current->cmyk_fill;
  59         gstate->cmyk_stroke = current->cmyk_stroke;
  60         gstate->gray_fill = current->gray_fill;
  61         gstate->gray_stroke = current->gray_stroke;
  62
  63         gstate->font = current->font;
  64         gstate->font_size = current->font_size;
  65
  66         gstate->prev = current;
  67         gstate->depth = current->depth + 1;
  68     } else {
  69         HPDF_TransMatrix DEF_MATRIX = {1, 0, 0, 1, 0, 0};
  70         HPDF_RGBColor DEF_RGB_COLOR = {0, 0, 0};
  71         HPDF_CMYKColor DEF_CMYK_COLOR = {0, 0, 0, 0};
  72         HPDF_DashMode DEF_DASH_MODE = {{0, 0, 0, 0, 0, 0, 0, 0}, 0, 0};
  73
  74         gstate->trans_matrix = DEF_MATRIX;
  75         gstate->line_width = HPDF_DEF_LINEWIDTH;
  76         gstate->line_cap = HPDF_DEF_LINECAP;
  77         gstate->line_join = HPDF_DEF_LINEJOIN;
  78         gstate->miter_limit = HPDF_DEF_MITERLIMIT;
  79         gstate->dash_mode = DEF_DASH_MODE;
  80         gstate->flatness = HPDF_DEF_FLATNESS;
  81
  82         gstate->char_space = HPDF_DEF_CHARSPACE;
  83         gstate->word_space = HPDF_DEF_WORDSPACE;
  84         gstate->h_scalling = HPDF_DEF_HSCALING;
  85         gstate->text_leading = HPDF_DEF_LEADING;
  86         gstate->rendering_mode = HPDF_DEF_RENDERING_MODE;
  87         gstate->text_rise = HPDF_DEF_RISE;
  88
  89         gstate->cs_stroke = HPDF_CS_DEVICE_GRAY;
  90         gstate->cs_fill = HPDF_CS_DEVICE_GRAY;
  91         gstate->rgb_fill = DEF_RGB_COLOR;
  92         gstate->rgb_stroke = DEF_RGB_COLOR;
  93         gstate->cmyk_fill = DEF_CMYK_COLOR;
  94         gstate->cmyk_stroke = DEF_CMYK_COLOR;
  95         gstate->gray_fill = 0;
  96         gstate->gray_stroke = 0;
  97
  98         gstate->font = NULL;
  99         gstate->font_size = 0;
 100         gstate->writing_mode = HPDF_WMODE_HORIZONTAL;
 101
 102         gstate->prev = NULL;
 103         gstate->depth = 1;
 104     }
 105
 106     return gstate;
 107 }
 108
 109 HPDF_GState
 110 HPDF_GState_Free  (HPDF_MMgr    mmgr,
 111                    HPDF_GState  gstate)
 112 {
 113     HPDF_GState current = NULL;
 114
 115     if (gstate) {
 116       current = gstate->prev;
 117       HPDF_FreeMem (mmgr, gstate);
 118     }
 119
 120     return current;
 121 }
 122